3. during a race, a sprinter increases from 5.0 m/s to 7.5 m/s over a period of 1.25s. what is the sprinter’s average acceleration during this period?
also try and explain
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Atank has a shape of a cone with a radius at the top of 2 m and a height of 5 m. the tank also has a 1 m spout at the top of the tank. the tank is filled with water up to a height of 2 m. find the work needed to pump all the water out the top of the spout. (use 9.8 m/s2 for g and the fact that the density of water is 1000 kg/m3.)